alliance



T. F. BAILY AND F. T. COPE.

DEVICE FOR HEAT TREATING'STEEL ARTICLES.

APPLICATION FILED JUNE 14. I9l8.

Patented Mar. 30, 1924).

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I m a u .11. 1F Iv... lvclhfi. a b no 4 UN lTllilD STA LEr i lE ATEN iF THADJDEUS F. BAILY AND FRANK T. COPE, OF ALLIANCE, OHIO, .Z-hE-iSIGlIQRS TO THE ELECTRIC FURNACE COMPANY, OF ALLIANCE, OEIU. CORPORATION 01* OHIO.

DEVICE FOR HEAT-TBEATIHG STEEL ARTICLES.

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Application filed June 14, 1918.

To all LUILOl/t it may concern:

Be it known that we, TnADDnUs F. BAILY and FRANK T. Corn, citizens of the United States, both residing at Alliance, in the county of Stark and State of Ohio, have invented. a new and useful Device for Heat- Treating Steel Articles, of which the following is a specification.

This invention relates to devices for heat treating steel articles and more especially to a device for uniformly heating steel articles oi? varying sectional thickness.

The object of this invention is to provide means for retarding the heating of certain portions of steel articles during the time that the article is within the furnace.

Another object is to provide means for quickly removing the heat retarding devices when the article has reached the desired temperature.

With these objects in view the invention consists in the novel construction and arrangement of parts, hereinafter described, illustrated in the accompanying drawings,

. and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size and minor details of construction may be made within the scope of the appended claims, without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings:

Figure 1 illustrates our heat retarding F means as applied to a steel artillery shell.

Fig. 2 is a modified form of shown in Fig. 1.

Similar numerals of reference indicate corresponding parts throughout the several figures of the drawings.

In the heat treatment of certain articles manufactured from steel it is necessary that all portions of the article shall be heated uniformly and that one portion of the article shall not rise in temperature more rapidly than other parts. Should one portion of the article being heated rise in temperature more rapidly than other parts the result would be that the grain of the steel after the heat treating and quenching processes are completed would vary according to the diflerence in temperature which the difierent parts had received, and the length of time theywere subjected to these temperatures.

the device Specification of Letters Patent.

Patented Mar. 39, 1920.

Serial No. 240.058,

111 the drawings we have used for the purpose of illustration an artillery shell of the armor piercing type. Because of the peculiar form of these shells it is a diilicult matter by the now known processes of heat treating, to bring all parts of the shell to an exact temperature within the furnace at the same rate of increase. The lower portion being merely a comparatively thin wall surrounding the explosive charge chamber, will heat up much more rapidly than the solid upper portion just above the charge chamber. The taper at the forward end of the shell, will also cause this portion to heat more rapidly. Thus a great variation will be found in the tei'nperatures of the different portions of the shell. lit is especially necessary that the point of an armor piercing shell be accurately hardened or the value of the shell will be materially reduced and frequently entirely absent.

In order to overcome this diliiculty we have designed the device here set forth which consists of forming a hollow metal jacket shown at 1 filled with a heat insulating sub stance 2, of extremely high fire test, such for instance as fire clay or the like. The interior of the insulating material is fashioned to fit a particular portion of the article to be heated such for instance as the cap 3 which fits the point of the shell shown in the drawings or the hollow cylindrical part 4, which fits about the walls to the charge chamber. It will be seen that when the article will be thus protected over certain parts of its surface, the direct heat from the furnace will only reach the exposed portions of the article direct.

When the temperature of the article being treated has risen to the exact point desired, the heated article must then be quickly plunged into the quenching bath. It will therefore be necessary to quickly remove our heat retarding device and for this reason a bail such as 5 will be welded or otherwise suitably secured to the metal jacket. A hook can then be inserted through the bail and the cap 3 quickly lifted from the shell. When more than one portion of the article being treated is covered by a separate retarding device, it will be necessary to secure all of the retarding devices in such a way that they can be removed simultaneously. With this object in view we construct a down-turned flange 6 about the upper extremity oi" the portion such as 1-. Arms or links '2 terminating in hooks 8 will be secured to the portion of the heat retarding device that carries the bail 5 and in placing; the heat retarders upon the article the hooks will be secured so that when the cap 3 is removed the other portion of the heat retarding device Will simultaneously be removed.

In Fig. 2 we have shown another form in which our heat retarding device may be constructed. l lere the metal acket is dispensed with lire clay or similar substance being tashioned with the bail and hooks SQClllGa'l into it directly.

lVhile We have shown our device as applied to an artillery shell it will be obvious that it can be as readily applied to a vast variety of articles manufactured from steel in which. it is necessary to produce an even heating and which are of a peculiar shape, giving diilerent sectional thicknesses to the metal, such for instance as gears, car Wheels and the like.

From the foregoing it can be readily seen that our device Will be of great value in the heat treatment of steel articles. The desired thickness of the insulating Walls can be accurately determined to iit each. particular case.

Having fully described our invention,

.. sai r it fore quenching and cooling.

A device for insulating the nose and charge chamber portions of a steel shell comprising); a cap of heat insulating material of extremely high lire test arranged to be located over the nose of the shell and a jacket of heat insulating material ojli' extremely high lire test arranged to be located around. the char e chamber portion oil the shell and means connecting said cap and jacket tenether and a bail upon the cap for removing the cap and jacket simultaneously.

5. ii device of the character descril ed comprising heat insulators "fashioned to fit upon certain portions of steel articles clt' varying thickness and means upon the said insulators for removing them from the arti cle s nultaneously.

in testimony that We claim the above, we have hereunto subscribed our names.

THADDEUS F. BAILY. FRANK T. COPE. 

